Sash construction



LKAHN, SASH CONSTRUCTIOIL AAAAAAAAA on man SEPT. 9. ma.

Patentedoct; 21,1919.

z I z a l I anogwtoz UNITED STATES PATENT onmon.

JULIUS KAHN, OF YOUNGSTOWN, OHIO, ASSIG-NOR TO TRUSCON STEEL QOMPANY, OF YOUNGSTOWN, OHIO, A CORPORATION OF MICHIGAN.

SASH CONSTRUCTION.

Specification of Letters Patent.

Patented Oct. 21', 1919.

Application filed September 9, 1918. Serial No 253,174.

To all whom it may concern Be it known that 1, Jones KAHN, a citicharacter which will have a high degree of strength and rigidity, which shall secure the intersecting members against displacement, and which shall be simple in construction, easy to assemble and economical to manufacture.

These and other objects of my invention are attained by the particular formation and arrangement of parts of the intersecting bars or members which are pointed out in the claims In the drawings, Figure 1 is a perspective .of two intersecting bars connected by my improved joint, Figs. 2 and 3 are a plan view and a side elevation, respectively, of the horizontal muntin bar which appears in Fig. 1. Figs. 4 and 5 are corresponding views of the barwhich appears in the vertical position in Fig. 1. Fig. 6 is a plan view of the assembled joint, Figs 7 and 8 are sections taken on the lines 7-7 and 8-8. re spectively, of Fig. 6. The arrangement of the bars might obviously be reversed.

In the embodiment of the invention shown, the cross section of the bars is substantially that of a cross, said bars being made up of the main web portions 1 and 2, the flanges 3 and 4, and the continuations 5 and 6 of the webs.

It will be observed-see particularly Figs. 2 and 3that the flanges 4 are cut away, at. least for a considerable portion of their depth, to form the dove tail notches or mortises 8 on oppositesides of the web 2-6. Fig. 2, and that the webelements 2 and 6 are notched at 9 and 10 respectively. Corresponding thereto. the web 15 is notched at 12, Fig. 5. for the greater portion of its depth, and the flanges 3 are notched at 13 to form tapering tenons 14 adapted to fit the ta. pering mortises or notches 8. The thickness 56 of the un-cut metal 15 at the bottom of the notch 12 is substantially equal to the depth of the notch 10. In'the punching operation small projections 16 are thrown upon the web 5 at the entrance to the notch 12.

From the foregoing it will be readily understood that the two bars may be assembled as indicated in Fig. l, and that the tenons 11 then fit snugly in the mortises or notches 8, thus tying the port-ions of the bar '2l6 together across and through the web 1-5; at the same time. the notch 10 allows the edge of the web '2 to come flush with that of the web 1, whereupon the projections16 may be hammered down into the notch 9 to fill the latter, and may finally be welded to one. another in the notch if desired. The flanges are all finally disposed in a single plane. thus forming a support for the glass (not shown).

The joint built up in this manner is for all practical purposes substantially as strong as an integral construction; each bar locks into the other and the webs and flanges of one make up for the loss of metal of the cut away portion of the other. The joint. moreover. presents a smooth and pleasing appearance and is susceptible of being manufactured by commercial processes which insure a low cost.-

I am aware that variations may be made in the details of construction and I do not. therefore, wish to be limited except as indicated by the subjoined claims.

I claim 1. In a metal sash or the like, a firstbar and a second bar intersecting each other .atright angles and each having a web and a pair of flanges the latter of which lie in a single plane, the flanges and a consider-- able portion of the web of the first bar being severed at the joint to receive the web of the second bar, the web of the second bar also being notched in one edge at the joint to receive the un-cut portion of the web of the first bar and having a second not-ch in its other edge. a projection on the web of the first bar bent into said second notch to lock the bars together, the portion of the first bar on opposite sides of the web of the second bar being connected together through said second bar through the medium of interlocking tapering mort-ises and tenons.

2. In a metal sash or the like, a first bar and a second bar intersecting each other and each being approximately cro$ shaped in cross-section, thereby forming two flanges, together with a relatively shallow web portion and a relatively deep Web portion, said first bar being notched across through the flanges and the relative shallow portion and a part of the relatively deep web portion at the joint to receive the web of the second bar, and interlocking mortises and tenons formed in the flanges of the two bars, the parts being so constructed and arranged that they can be assembled only by a relative movement of the bars transversely of the plane of the sash, said flanges forming, without additional elements, a tension connection between those portions of the first bar on opposite sides of the notch.

3. In a metal sash, or the like, a first and a second bar intersecting each other at right angles and each having a web and a pair of flanges the latter of which lie in a single plane, the first bar being notched across the flanges "33d a considerable portion of the web at the joint to receive the web of the second bar, the web of the second bar also being notched, and the first bar having projections at each side of the notch bent over into said notch in the second bar to fill the same to lock the bars together, the portions of the first bar on opposite sides of the web of the second bar being connected together through said second bar by means of tapering interlocking lnortises and tenons formed by the flanges of the two bars.

JULIUS KAHN. 

